Book/Report FZJ-2018-03548

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Low-lying states of pionic atoms : First Collaboration Meeting Experiment 10 Forschungszentrum Jülich, Jülich, 26 June 1991

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1991
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 2500, 191 p. ()

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Report No.: Juel-2500

Abstract: COSY Experiment 10 is the experimental study of low-ying states of pionic atoms through the nuclear reaction p+A $\rightarrow$ (A-1}$^{\pi^-}$ + 2p, i. e. through the elementary process p + n $\rightarrow$ $\pi^{-}$ + 2p under recoil-free kinematics conditions and with a 4r detector geometry. The formation of pionic atoms and the energy and width of their low-lying states is to be determined. Such an investigation is feasible only with a beam that has the spatial and energy definition of the new COSY facility. The transparencies that were shown by the speakers at a recent collaboration meeting are presented here. Transcripts of the discussions that followed each talk are also included. Some of the key papers and preprints that the speakers referred to have been included to provide a better understanding of the transparencies. Abstracts of each talk were added by the editors for the same purpose. The theoretical Background and motivation for the experiment and the major components of the detector System and of the data handling System were treated in some detail. Also discussed was a proposal for an experiment that is to test the separate components of the detector and data handling systems, a study of the reaction $\overrightarrow{p}$ + $^{2}$H $\rightarrow$ $^{3}$He + $\eta$ with a 4$\pi$ detector from threshold up to 1.9 GeV/c. The study of that reaction is of interest by itself, since it will allow one to distinguish between one- and two-step processes. The editors wish to thank all collaborators and other interested persons who participated in the meeting, in particular the speakers. Thanks are also due to Professor Dr. J. Treusch and the other members of the Vorstand, Forschungszentrum Jülich for supporting this collaboration meeting and to Frau F. Wittig, IKP, for her assistance in conducting the meeting and in compiling the proceedings.


Contributing Institute(s):
  1. Publikationen vor 2000 (PRE-2000)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

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 Record created 2018-06-15, last modified 2021-01-29


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